JPS6285571A - Light beam scan device - Google Patents

Abstract

PURPOSE:To accurately set a recording medium at a prescribed position on a holding surface for the recording medium, by using a slant feed roller, a guide plate and a sheet stop means to position the recording medium on the holding surface of a recording medium holding means. CONSTITUTION:A slant feed roller 23 is set within an opening 22 and under the holding surface of a recording medium holding means. The roller 23 moves up and turns toward G to move a recording medium 5 toward F2 when the medium 5 is moved inside a guide plate 21 and a detector 24 by the feed rolls 17A and 17B. Thus the medium 5 first touches the plate 21 and is positioned in the primary scan direction. When the roller 23 is revolved more and more, the medium 5 is moved in the secondary scan direction (arrow F3) while having a contact with the plate 21 at a side edge of the medium 5. Thus the tip of the medium 5 reaches the detector 24. The detector 24 detects the tip of the medium 5 and delivers a detecting signal to stop the revolution of the roller 23. Then the roller 23 is moved down.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a light beam scanning device that scans a light beam using an optical deflector, and more particularly, to miniaturization of the entire device,
The present invention relates to a light beam scanning device that can reduce costs.

(Technical Background and Prior Art of the Invention) Conventionally, a light beam scanning device that deflects a light beam using an optical deflector and scans a scanning sheet relatively two-dimensionally has been used to perform various types of scanning recording, scanning and recording. It is widely used in reading devices, etc. Two-dimensional scanning of the light beam in these light beam scanning devices involves deflecting the light beam with an optical deflector to main scan the scanning sheet, and
This is performed by relatively moving the light beam and the scanning sheet in a sub-scanning direction that is substantially orthogonal to the main scanning direction.

However, in the conventional apparatus, a problem arises in that the means for performing the sub-scanning makes the apparatus large and expensive. Hereinafter, problems with the conventional light beam scanning device will be explained with reference to FIG.

In accordance with FIG. 8, in the light beam scanning device, the beam light source 1
A light beam 102 emitted from 01 enters a rotating polygon mirror 103, which is an optical deflector, and the rotating polygon mirror 103 moves in the direction of arrow A.
As it rotates in the direction, it is reflected and deflected. The light beam 102 reflected by the rotating polygon mirror 103 passes through an fθ lens 104, which is an imaging lens, provided on the optical path, and then main-scans the scanning sheet 105 in the direction of arrow B. The scanning sheet 105 is scanned in the main scanning direction as the rotating drum 106 rotates while being held between a rotating drum 106 rotating in the direction of arrow C and a pair of rollers 107A and IQ7B provided on the rotating drum 10G. The sub-scanning is carried out by being conveyed in the direction of the arrow, which is substantially perpendicular to the arrow. Therefore, the light beam 102 is thus conveyed (sub-scanned) in the direction of the arrow on the scanning sheet 10.
The scanning sheet 105 is two-dimensionally scanned by repeatedly scanning the scanning sheet 105 in the direction of the arrow B.
Image information is recorded over substantially the entire surface of 5.

However, in the above device, sub-scanning is performed by moving the scanning sheet 105;
In order to suppress load fluctuations on the motor 108 as much as possible during sub-scanning and prevent sub-scanning unevenness from occurring, support stands 109 and 110 that support the scanning sheet 105 are installed 1yl after the scanning position by the light beam 102 as shown in the figure. It is necessary to provide a space in which one scanning sheet can be placed in each case. For this reason, the above-mentioned apparatus requires a space having a length of two or more scanning sheets in the sub-scanning direction, resulting in an increase in the size of the entire apparatus. Further, the rotating drum 106 that conveys the scanning sheet 105 has a width larger than the width of the scanning sheet in order to stably convey the scanning sheet, and the motor 108 that rotates this rotating drum 106 further has a width larger than the width of the scanning sheet. Since it is provided in the width direction of the rotating drum 106, the above device is also large in the main scanning direction.

Furthermore, in order to scan the scanning sheet 105 with high precision while conveying the scanning sheet 105, it is necessary to
It is necessary to strictly control the motor 108 to be able to transport the 105 at a constant speed in the correct direction with high precision, and since high-speed motors that can be controlled as described above are expensive, There is also the problem that the cost increases significantly. Further, in order to stably convey the scanning sheet 105, the rollers 107A and 107B are essential; however, these rollers 107A and 10
7B, scanning sheet 105
Scanning cannot be performed at both ends in the sub-scanning direction, and if the apparatus is a light beam recording apparatus, there is also the inconvenience that a request for black edges at both ends cannot be met.

(Objective of the Invention) The present invention has been made in view of the above-mentioned problems, and solves the problems of increasing the size of the device that stops by moving the scanning sheet and performing the A1 scan, and increasing the manufacturing cost. It is an object of the present invention to provide a compact and inexpensive light beam scanning device.

(Structure of the Invention) The light beam scanning device of the present invention comprises: a main scanning optical deflector that is provided on the optical path of a light beam emitted from a beam light source and deflects the light beam; An imaging lens provided on the optical path of the deflected light beam and capable of focusing the light beam on a predetermined straight line; an imaging lens provided on the optical path of the light beam that has passed through the imaging lens in the main scanning direction; an elongated sub-scanning mirror that extends in the direction of the light beam, is provided at an angle with respect to the optical path of the light beam, and is movable in the optical axis direction of the imaging lens; and the optical axis of the sub-scanning mirror. A scanning sheet that holds the scanning sheet on a plane formed by a straight line trajectory located at a position conjugate with the straight line on which the light beam is imaged with respect to the sub-scanning mirror that moves with the movement of the sub-scanning mirror. The first feature is that it includes a holding means.

That is, in the light beam scanning device of the present invention, the light beam deflected in the main scanning direction is reflected by the sub-scanning mirror and incident on the scanning sheet, and sub-scanning is performed by moving the sub-scanning mirror. Since the scanning sheet is fixed by the scanning sheet holding means, there is no need to make the device large in the sub-scanning direction, unlike when carrying the scanning sheet for sub-scanning, making the entire device compact. be able to. In addition, the motor for moving the sub-scanning mirror for sub-scanning does not undergo load fluctuations unlike when conveying a scanning sheet, so it is easy to control. An i-type motor can be used, and the manufacturing cost of an i-type can be reduced.

By the way, in the light beam scanning device of the present invention, since the scanning sheet is held on the above-mentioned specific plane by the scanning sheet holding means, it is necessary to correctly position it in the main scanning direction and the sub-scanning direction on this holding surface. There is.

Therefore, the apparatus of the present invention includes a vehicle displacement direction scanning sheet stopping means provided in the vicinity of one edge of the scanning sheet holding surface of the scanning sheet holding means, and another side of the holding surface perpendicular to the one edge of the holding surface. A sub-scanning direction scanning sheet stopping means provided near the edge, a carrying means for carrying the scanning sheet inward of the main scanning direction scanning sheet stopping means and the sub-scanning direction scanning sheet PP release means on the front self-holding surface. , and below the retaining surface,
provided so as to be movable between a first position where the upper end is on the holding surface and a second position where the upper end is retreated from the holding surface;
A second aspect of the present invention includes a diagonal feed roller capable of moving the scanning sheet in the first position in a diagonal direction that is a combination of the one edge direction of the scanning sheet holding surface and the other edge direction of the scanning sheet holding surface. This is a characteristic feature.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an outline of a light beam recording device which is an embodiment of the light beam scanning device of the present invention.

The light beam 2 emitted from the Rade light source 1 is modulated by entering a modulator 6 driven by a modulator drive circuit 7 based on a signal emitted from an image signal output circuit 8 that outputs an image signal. The light enters the rotating polygon mirror 3, which is a main scanning optical deflector, and is deflected in the direction of arrow A. As the laser light source 1, in addition to a He-Ne laser, an Ar laser, etc., a laser light source formed by a combination of a semiconductor laser and a beam shaping optical system is used. In addition, when using a laser light source capable of direct modulation such as a semiconductor laser, the modulator 6 is not particularly provided in the optical path of the light beam 2, and the laser light source 1 is directly controlled to modulate the light beam 2. You can also do this. Further, as the main scanning optical deflector, other types of optical deflectors such as a galvanometer mirror and an acousto-optic deflector (AOD) may be used in addition to the above-mentioned rotating polygon mirror.

The light beam 2 deflected by the rotating polygon mirror 3 passes through a main scanning imaging lens 4 such as an fθ lens provided on the optical path, and then is driven by a motor 9 to rotate the imaging lens 4 at a low speed. Reflection surface 1 of a long sub-scanning mirror 10 extending in the main scanning direction and moving linearly in the direction of arrow C, which is the optical axis direction.
It is incident on 0a and reflected. Further, below this sub-scanning mirror 10, on the optical path of the light beam 2 reflected by the sub-scanning mirror 10, a sheet-like recording material (scanning sheet) 5 such as a photosensitive film or photographic paper is placed. As will be described in detail, it is supported by a recording medium holding means 11 having a holding surface 11a that is inclined at a predetermined angle with respect to the incident light beam so as to have a specific relationship with the sub-scanning mirror 10. This holding means 11 is formed, for example, by processing a plate-like object or by integrally molding a synthetic resin or the like.

When the recording medium 5 is held on the recording medium holding means 11 as described above, the light beam 2 deflected by the rotating polygon ff13 main scans the recording medium 5 in the direction of arrow B. The imaging lens 4 is a lens that converges the light beam 2 onto the recording medium 5 and causes the light beam 2, which has been deflected by the rotating polygon 13 at a constant angular velocity, to scan at a constant speed on the flat recording medium 5. .

Further, in the illustrated recording apparatus, sub-scanning is performed by moving a sub-scanning mirror 10 with respect to the recording medium 5. Next, the relationship between the sub-scanning mirror and the recording medium and the mechanism of sub-scanning will be described with reference to FIG. 2, which is a conceptual side view of the apparatus shown in FIG. 1.

The light beam 2 reflected and deflected by the rotating polygon mirror 3 passes through the imaging lens 4 provided on the optical path, as described above. This imaging lens 4 is capable of focusing the incident light beam 2 on a predetermined imaging position eIP1 located on a straight line perpendicular to the paper plane of FIG. This imaging lens 4
As mentioned above, the elongated sub-scanning mirror 10 is provided on the optical path of the light beam 2 that has passed through the sub-scanning mirror 10. The mirror 1 is provided at an angle with respect to the optical path of the light beam 2 so as to cause the light beam 2 to be reflected downward by this 51!1 scanning mirror 1°. The light beam 2 reflected by the sub-scanning mirror 10 reaches an imaging position P2 which is conjugate with the imaging position I P 1 with respect to the sub-scanning mirror 1°.
The image is formed at . The imaging position P2 of the light beam 2 reflected by the sub-scanning mirror 10 changes as the sub-scanning mirror 10 moves in the direction of arrow C. The imaging position m P with respect to the sub-scanning mirror 10 changes! It is held on a plane formed by the locus of the imaging position P2 located at a position conjugate with . That is, the recording medium 5 is exposed to the light beam 2.
n1 scanning mirror 10 on a plane tilted with respect to the incident light beam 2 by an angle α equal to the incident angle α of the light beam on the sub-scanning mirror 10.
It is arranged at a position that allows the incidence of the light beam 2 reflected by.

As described above, the sub-scanning mirror 10 moves along the arrow C while recording image information on one recording medium 5.
direction, the sub-scanning mirror 1 gradually moves in a straight line by a range S sufficient for the light beam 2 to scan the entire surface of the recording medium 5.
0, the main scanning line formed by the light beam 2 on the recording medium 5 is gradually moved in the direction of the arrow, thereby performing sub-scanning.

Therefore, the light beam 2 is caused to two-dimensionally scan the entire surface of the recording medium 5 by the rotating polygonal mirror 3 and the sub-scanning mirror 10.

The movement of the sub-scanning mirror 10 is carried out by a pair of pulleys 12A, 12B rotated by a motor 9, and a pair of driven pulleys 13A, as shown in FIG.
, 13[3, and moves as the pulleys 12A and 12B rotate, the mirror support member 15a connected to the wires 14 provided at both ends of the sub-scanning mirror moves on the guide rail 15b. This is done by moving. Note that the movement of the sub-scanning mirror 10 is as follows:
In addition to the wire drive as described above, various means can be used depending on the requirements of the device design, such as movement using a linear motor.

As described above, when the sub-scanning mirror 10 moves within a predetermined range at a predetermined speed and the necessary image information is recorded over the entire surface of the recording medium 5, the sub-scanning mirror 10 moves in the moving direction. It is moved in the opposite direction and returned to the initial position in preparation for recording on the next recording medium 5. In this embodiment, as shown in FIG.
is detected to determine the image recording scan start position.

That is, by moving the sub-scanning mirror 10 from the initial position in the direction of arrow C, it is detected that the light beam 2 has reached the end of the recording medium 5, and at this point, the light modulator 6 is activated based on the image signal. It is activated to modulate the light beam 2 and start recording an image on the recording medium 5.

As described above, in the apparatus of the present invention, sub-scanning is performed by fixing the recording medium 5 and moving the sub-scanning mirror 10 to move the light beam 2. Therefore, when moving the recording medium side, In comparison, the size of the device in the sub-scanning direction can be reduced to less than half. Further, the length of the sub-scanning mirror 10 in the main scanning direction is sufficient as long as it is good enough to allow the incidence of the light beam 2, and it is sufficient that it is shorter than the length of the main scanning line on the recording medium 5. Therefore, even if the sub-scanning mirror 10 and the mirror moving means are combined, it is sufficiently possible to make the length shorter than the length of the recording medium holding means 11 in the main scanning direction. It is also compact in the main scanning direction.

Furthermore, since the motor 9 that drives the sub-scanning mirror 10 does not undergo load fluctuations, it is easy to control, and a relatively inexpensive motor can be used. Furthermore, since the recording medium 5 held by the recording medium holding means 11 can be irradiated with the light beam 2 from the front end to the rear end in the sub-scanning direction to perform recording on the entire surface of the recording medium, both ends of the recording medium can be recorded. It is also easy to make it black. Note that depending on the type of recording body, the recording body 5 may be attached to the recording body holding means 11.
If the recording medium 5 does not adapt well to the holding surface 11a and is difficult to maintain in a flat state, a suction means may be provided in the recording medium holding means 11 to suction the recording medium 5 onto the holding surface 11a.

By the way, in the apparatus of this embodiment as described above, the recording medium 5 is held at a predetermined position on the obliquely inclined holding surface 11a by the recording medium holding means 11, and a light beam passes over the held recording medium 5. 2 scans two-dimensionally. For this reason,
Prior to scanning with the light beam 2, the recording medium 5 is placed on the holding surface 11.
It is necessary to accurately position the image on a in both the main scanning direction and the sub-scanning direction. Therefore, the 'JA position is provided with positioning means for carrying the recording medium 5 onto the holding surface and positioning it reliably. The above means will be explained below with reference to FIG. 1 and the following figures.

A pair of carry-in rollers 17A and 17B, which are means for carrying in the record body 5, are provided near the upper end of the record body holding means 11. These carry-in rollers 17A, 17B are used to carry out recording bodies after the recording bodies are sucked one by one by the suction means 20 from the magazine 18 in which a plurality of recording bodies are accommodated, as shown in FIG. 3(a). , grips the recording medium 5 that falls while being guided by the guide Ifi 19, rotates in the direction of arrow E, and carries the recording medium 5 along the holding surface 11a.

Further, as shown in FIG. 1, a guide plate 21 projecting upward is provided on one side edge, which is one end edge of the holding surface 11a, and the recording medium 5 is moved by the carrying-in rollers 17A, 17B.
As a result of the rotation, the guide plate 21 on the holding surface 11a is moved inward in the direction of arrow F1 as shown in FIG. 3(a),
The recording medium 5 is carried in front of the predetermined position on the holding surface 11a where the recording medium 5 is to be held.

On the other hand, below the holding surface 11a, there is a first position where the upper end is exposed to the holding surface 11a through an opening 22 provided in the holding surface 11a and whose upper end is above the holding surface 11a, and a first position where the upper end is located above the holding surface 11a, and a first position where the upper end is located above the holding surface 11a. A diagonal feed roller 23 is provided, which is movably provided so as to be able to take a second position in which the recording medium 5 is moved as shown in FIG. When being carried onto the holding surface 11a by the carrying-in rollers 17A and 17B, the upper end is in the second position retreated from the holding surface 11a, but the carrying-in roller 17
When the recording medium 5 is carried in front of the predetermined position of the holding surface 11a and 17B by A and 17B, it is placed upside down in the first position and touches the lower surface of the recording medium 5, as shown in FIG. 3(b). come into contact with

The width adjustment of the recording medium by the diagonal feed roller 23 at this first position will be described with reference to FIG. 4, which is a plan view of the recording medium holding means 11.

FIG. 4(a) shows a state in which the conveying rollers 17A and 17B have finished conveying the recording medium and the diagonal feed roller 23 has risen to the first position. The recording medium holding means 11 is provided with a detector 24 such as a reflective photointerrupter or a limit switch constituting a recording medium stopping means at a portion where the leading end of the recording medium 5 is located at a predetermined position. The feed roller 23 moves the recording medium 5 in the direction of the minus side edge of the holding surface 11a where the guide plate 21 is provided, and in the direction of the other edge perpendicular to the minus side edge where the detector 24 is provided nearby. The holding surface 11a is provided so as to extend in a diagonal direction with respect to the main scanning direction and the sub-scanning direction so that the above-mentioned transportation is possible. This diagonal feed row 523 rotates in the direction of arrow G as shown in FIG. The recording medium 5 is moved in the two directions indicated by the arrows.The diagonal feed roller 23 is configured such that the angle θ with respect to the main scanning direction on the holding surface 11a is such that the leading edge of the recording medium 5 reaches the position of the detector 24. The angle is set so that the side edge of the recording medium 5 comes into contact with the guide plate 21, and the recording medium 5 is first brought into contact with the guide plate 21 by this diagonal feed roller 23, and its position in the main scanning direction is performed. Further, as the diagonal feed roller 23 continues to rotate, the recording medium 5 is moved in the direction of arrow F3, which is the sub-scanning direction, while bringing its side end into contact with the guide plate 21, as shown in FIG. 4(C). and reaches a predetermined position where its tip reaches the detector 24.

The detector 24 detects the leading edge of the recording medium 5 that has reached a predetermined position and issues a detection signal.
The rotation of the diagonal feed roller is stopped. When the recording medium 5 is placed at a predetermined position on the holding surface 11a in this way, the diagonal feed roller 23 moves from the first position shown in FIG. 3(C) to the second position shown in FIG. 3(d). In this state, the optical dome 2 performs two-dimensional scanning.

In addition, as mentioned above, it is true! In a bad situation, the recording medium 5 is moved only by the carry-in rollers 17A, 17B, the diagonal feed roller 23, etc., and it is necessary that the recording medium 5 does not fall under its own weight on the obliquely inclined holding surface 11a. For this reason, the surface 11a is designed to minimize its inclination with respect to the horizontal plane, and to maintain the I'i! I
It is desirable to prevent the recording medium 5 from falling under its own weight by forming it with a material that has a large l'N. The recording medium 5 is sucked onto the holding surface with a strength within a range that prevents the recording medium 5 from falling under its own weight and allows the recording medium to be moved by the carry-in rollers 17A, 17[3, the recording medium feed roller, etc. The following suction means may be provided within the recording medium holding means 11.

When the recording by the light beam 2 is completed as described above, the third light beam
As shown in FIG. (8) and FIG. 4(d), the diagonal feed roller 23 moves upward again and reaches the first position 110, and rotates again in the direction of arrow G to move the recording medium 5 to the recording medium. It is moved to the lower end side of the holding means 11. Recording body holding means 11
A pair of carry-out rollers 25A and 25B are provided near the lower end of the recording medium 5 as means for carrying out the recording medium 5, and the diagonal feed roller 23 continues recording until the leading edge of the recording medium 5 is gripped by the carry-out rollers 25A and 25B. Move the body in the direction of arrow F4. The recording medium 5 gripped by the carry-out rollers 25A, 25B in this way is
The rotation of 3 moves it further outward, and records am
It is carried outside. Note that the recording medium 5 taken out from the device
are carried into, for example, an automatic developing machine or a receiving magazine, but the delivery rollers 25A and 25B may also serve as entrance rollers of the automatic developing machine or the like. When the recording medium 5 is carried out of the apparatus in this manner, the diagonal feed roller 23 descends and returns to the second position, allowing a new recording medium to be carried in. Note that the position where the detector 24 is provided is not limited to the above-mentioned position; for example, the detector 24 may be provided at a portion of the recording body holding means 11 where the rear end of the recording body 5 is located at a predetermined position where the recording body 5 is held. A detector may be provided to detect the rear end of the recording medium 5 placed at a predetermined position. Further, the shape of the guide plate 21 may also be such that a plurality of plate-like members are provided discontinuously, as shown in FIG.

Furthermore, in the embodiment described above, the detector 24 is used as recording body stopping means for controlling the positioning of the recording body 5 in the sub-scanning direction.
As shown in FIG. 6, a recording body stop plate 26 is provided near the lower end of the first stage 11 of recording body holders, extending in a direction perpendicular to the guide plate 21, and positions the recording body 5 by abutting it thereon. It may be. That is, the recording medium stop plate 26 is connected to the driving means 2 such as a rotary solenoid or a motor, for example.
7, the recording body 5 is carried in by a carry-in means such as a carry-in roller, and while being positioned by the diagonal feed row 523 as described above, the recording body 5 is in a position protruding above the holding surface 11a as shown in the figure. The leading end of the recording body 5 is brought into contact with the recording body 5 to stop the recording body 5 at a predetermined position in the sub-scanning direction, and the positioning of the recording body 5 is completed in both the main scanning direction and the sub-scanning direction,
When the recording by the light beam 2 is completed, the driving means 27
The recording medium 5 is rotated in the direction of arrow T1 and retreated from above the holding surface 11a to allow the recording medium 5 to be carried out.

When the positioning of the recording medium 5 in the sub-scanning direction is controlled by the stop plate in this way, the diagonal feed roller 23 is moved to the stop plate 2 before the recording medium is brought into contact with the guide plate 21.
6 and positioning in the sub-scanning direction may be performed first. Further, to carry out the recording medium 5, the diagonal feed roller 23 is rotated in the opposite direction to the direction of the arrow G, without using the above-mentioned carry-out rollers 25A, 25B, etc., and the recording body 5 is moved to the side of the carrying-in rollers 17A, 17B. This may also be done by moving the recording medium to the conveyance rollers 17A, 17B and gripping the recording medium, and then reversing the conveyance rollers 17A, 17B and using them as conveyance rollers. In this case, the stop plate 26 may be fixed at a position protruding above the holding surface 11a.

Further, in each of the embodiments described above, the guide plate is used to position the recording medium 5 in the main scanning direction, but when the stop plate 26 is used to position the recording medium 5 in the DI scanning direction. Alternatively, recording body stopping means using a detector or the like may be provided near the side edge of the holding surface 11a to control positioning in the main scanning direction. Note that when a detector is used as recording body stopping means to control the positioning of the recording body in the main scanning direction, the diagonal feed roller 23 is moved so that the leading edge of the recording body 5 is detected before the detector detects the side edge of the recording body 5. It is necessary to arrange the recording medium in a direction that allows it to move so as to come into contact with the guide plate.

Furthermore, instead of providing one long roller as described above, as the diagonal feed roller, two relatively short diagonal feed rollers 23A are used as shown in FIG. 7(a).

23B may be provided coaxially, or, as shown in FIG. 7(b), the rotation axes of these two feed rollers may be shifted parallel to each other to form diagonal feed rollers 23A' and 23B.
' may also be used. Further, the diagonal feed roller does not have to be strictly a single roller as long as it has the same I-function as the roller, and as shown in FIG. 7(d'), a belt 23c is suspended between two rotating rollers 23a and 23b. As an example, two members formed by the above may be arranged side by side as shown in FIG. 7(C) to form the diagonal feed roller 23'.

The light beam scanning device of the present invention has been described above using a light beam recording device as an example. Information recording and reproducing system (Unexamined Japanese Patent Publication No. 55-1
No. 2429, No. 56-11395.

5G-11397@ etc.) can also be applied to various types of light beam reading devices, and the above-mentioned effects can be achieved in the same way with light beam reading devices. In this case, the light detecting means for detecting reflected light, transmitted light, 1 emitted light, etc. on the scanning sheet moves with the movement of the sub-scanning mirror 10 and moves opposite to the scanning line. All you have to do is move it.

(Effects of the Invention) As explained above, according to the light beam scanning device of the present invention, by performing sub-scanning with the scanning sheet fixed,
The entire device can be downsized, especially in the sub-scanning direction.

In addition, the motor that moves the sub-scanning mirror in the sub-scanning direction is easy to control because there is no load fluctuation, and it is possible to use a motor that is cheaper than the motor used to move the scanning sheet side. This reduces the manufacturing cost of the entire device.

Furthermore, the apparatus of the present invention is provided with a diagonal feed roller, a guide plate, and a sheet stopping means, and these members position the scanning sheet on the holding surface of the scanning sheet holding means, thereby positioning the scanning sheet on the holding surface. can be reliably positioned at a predetermined position.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an overview of a light beam recording device according to an embodiment of the present invention, FIG. 2 is a first conceptual side view explaining sub-scanning in the device, and FIGS. 3(a) to (e) ) is the loading of the recording medium into the above device,
FIG. 4(a) to (d) is a schematic plan view of the above device explaining the positioning of the recording medium by the diagonal feed roller; FIG. 6 is a perspective view showing an embodiment of the guide plate used in the present invention, FIG. 6 is a perspective view showing an embodiment of the recording medium stopping means used in the present invention, and FIGS. FIG. 8 is a schematic diagram showing an embodiment of a diagonal feed roller used in the present invention, and FIG. 8 is a perspective view showing an outline of a conventional light beam scanning device. 1... Beam light source 2... Light beam 3...
Rotating polygon mirror 4... Imaging lens 5... Recording body 10... Sub-scanning mirror 11... Recording body holding means 11a... Holding surface 17A, 173.
... Carrying roller 21 ... Guide plate 23 ... Diagonal feed roller 24 ... Detector Fig. 2

Claims (2)

[Claims] (1) A light beam emitted from a beam light source is caused to scan a scanning sheet in a main scanning direction, and the light beam and the scanning sheet are relatively moved in a sub-scanning direction substantially orthogonal to the main scanning direction. In the light beam scanning device that two-dimensionally scans the light beam on the scanning sheet, a main scanning optical deflector is provided on the optical path of the light beam emitted from the beam light source and deflects the light beam. , an imaging lens that is provided on the optical path of the light beam deflected by the main scanning optical deflector and is capable of focusing the light beam on a predetermined straight line; and the light beam that has passed through the imaging lens. an elongated sub-scanning mirror that is located on the optical path of the image forming lens, extends in the main scanning direction, is provided at an angle with respect to the optical path of the light beam, and is movable in the optical axis direction of the imaging lens; and on a plane formed by a straight line locus that moves with the movement of the sub-scanning mirror in the optical axis direction and is located at a position conjugate with the straight line on which the light beam is imaged with respect to the sub-scanning mirror. a scanning sheet holding means for holding the scanning sheet, a main scanning direction scanning sheet stopping means provided near one edge of a scanning sheet holding surface of the scanning sheet holding means, the one edge of the holding surface; a sub-scanning direction scanning sheet stop means provided near the other edge of the holding surface perpendicularly to the holding surface;
A carrying means for carrying the scanning sheet into the main scanning direction scanning sheet stopping means and the sub scanning direction scanning sheet stopping means on the holding surface, and a carrying means below the holding surface, the upper end of which is on the holding surface. movably provided to take a first position and a second position of retreating from the holding surface;
Light beam scanning characterized by having a diagonal feed roller capable of moving the scanning sheet at the first position in an oblique direction that is a combination of the one edge direction and the other edge direction of the scanning sheet holding surface. Device. (2) The light according to claim 1, wherein the main scanning direction scanning sheet stopping means is a guide plate provided on one edge of the scanning sheet holding surface to protrude upward. Beam scanning device.